<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>测试一下</title>
</head>
<body>
        <form action="" method="post">
            <input type="text" name="username">
            <input type="password" name="password">
            <input type="submit" name="" value="tijiao ">
        </form>
</body>
</html>